Etude de traitement par photocatalyse d’une eau usée chargée en colorant organique synthétique

Abstract

This work focuses on the preparation and characterization of pure and (Al, F) co-doped ZnO thin films, electrodeposited onto ITO substrates, and the evaluation of their activity in heterogeneous photocatalysis for the degradation of the anionic dye Congo Red in aqueous medium. The prepared materials were studied by X-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS), electrochemical characterization by cyclic voltammetry and chronoamperometry, as well as UV-visible absorption spectroscopy. Photocatalytic results under UV-visible irradiation reveal a degradation of 85% of Congo Red after 240 minutes of irradiation. The obtained results show that pure and (Al, F) co-doped ZnO exhibit comparable photocatalytic efficiencies, confirming the potential of these materials for the treatment of textile industrial wastewater.